Pneumatic sweeper.



J. G. STAMM.

PNEUMATIO SWEBPER.

APPLIoA'rIoN 1mm) MAY se. 191s.

1,089,800. Patented Mar.10,1914.

2 SHEETBEHBET 1.

' and @y la J. G. STAMM. PNEUMATIG SWBBPBE.

nrLloA'rrolr FILED un ze, 191s.

Patented Mar. 10, 1914 2 SHEETS-SHEET 2.

l I I l l l I l l I l Ii uw Nw S JOHN G. STAMM, F CANTON, OHIO.

PNEUMATIC SWEEPER.

Specification of Letters Patent.

Patented Mar. 10, 19ML.

Application led May 26, 1913. Serial No. 769,987.

To all 'x0/tom. it may concern Re it known that I, JOHN G. S'rAMM, citif zen of the United States, residing at Canton, in the county of Stark and State of Ohio, have invented certain new and useful lm` provements in Pneumatic Sweepers, of which the following is a specification.

T his invention relates to a pneumatic or Isuction sweeper for the purpose of cleaning carpets or the like, and of that type e1nploying a fan in connection with a nozzle and conduit for the dustyv air, the fan being driven by means of wheels on which the sweeper is mount-ed, the sweeper heilig rolled back and forth over the surface to be swept, with gearing between the wheels and the fan to drive the latter in one direction and permit back slip when the wheels are turned in the other direction. A rotary brush is provided in the nozzle, for dislodging the dirt which is taken np by the fan.

The invention is illustrated in the accompanying drawing in which- Figure 1 is a top plan view of the device. Fig. 2 a part sectional view of same. Figs. 3 and 3 are detail views in section of the fan pulley. Fig. 4t is a detail view ot' the stub axle.

Referring specifically to the drawings, 6 indicates the body or casing of the sweeper which is mounted on two large wheels 7,v one at each side, and a caster wheel 7 at the back. The wheels- T are carried on stub axles 7" at opposite sides of the casing. The. casing contains a circular fan chamber 4() formed between a top plate 41 and a bottom plate 42, with a nozzle 21 extending from the .front and terminating in a slot 21. close to the floor. Mounted to rotate within the nozzle, and in position to work through the slot 2.1, is a. rot-ary brush 22. The fan 20 rotates in horizontal position in the fan chamber, being fixed on a shaft 19 which is supported in4 bearings in the top plate 11 and the bot-tom plate n outlet 2t extends from the back of the tan chamber, and may be connected to any suitable dis charge pipe, or to a dust bag Q hung on the handle 50, by means ot' which handle the sweeper is manipulated.

The Wheels 7 are provided with internal gears 8 meshing with pinions 9 on shafts 9 which extend across the sweeper under the fan casingr and are supported in bearings in brackets 10. The rear shaft 9 carries a sprocket wheel 11 which drives a sprocket chain 12 over a sprocket wheel 13 mounted on a sleeve 14. This sleeve turns on the front shaft 9J. Mounted on the sleeve is a pulley 15 which drives a belt 15 around a pulley 16 on the lower projecting end of the fan shaft 19. The pulley 16 carries spring pins 18 which engage in ratchet teeth 18 on the fan shaft 19. The pins engage in the ratchet teeth in one direction and permit slip in the opposite direction. The front shaft 9 carries two belt pulleys 26 which drive a belt 26 over belt wheels 27 on the shaft of the rotary brush Q2 in order to drive the brush.

vWhen the sweeper is pushed forward by means of the handle, the gearing described drives the fan, and also the rotary brush, and the dirt which is dislodged by the brush is sucked up through the nozzle and forced out through the hose 24 and into the dust bag. On backward movement of the sweeper the brush continues to rotate, but the fan is not positively driven, although in consequence of the momentum imparted at the forward movement it will continue to turn in the same direction. T here thus practically continuous operation of the suction devices, even when the sweeper is pulled back and forth, the drive being imparted by one movement and continuing, in consequence of the slip of the pins, during the reverse movement of the sweeper. The machine so constructed is so light that it can be easily operated, and the gearing is conveniently accessible for inspection if necessary.

l/Vhat I claim is:

A suction sweeper comprising a fan casing, a. fan therein, a nozzle projecting from the casing, wheels on which the casing is mounted, driving gearing between the wheels and the fan, a rotary brush at the mouth of the nozzle, and driving mechanism between the wheels` and the brush, the gearing between the wheels and fan including a clutch engaging in one direction and permitting slip in the other direction, whereby the In testimony whereof, I do aix my siglrush wilbbehpositively driven idnbopposit nature in presence of two witnesses.

irection as t e sweeper is move ack an K forth, and the fan will be positively driven JOHN G' STAMM' 5 in one direction and will run free by its Witnesses:

momentum, when the sweeper is moved in J. B. DAVIS, the opposite direction. JOHN A. BOMMHARDT. 

